4637167 Isuzu original engine assembly 6WG1 for Hitachi ZX870-3 excavators

The Isuzu 6WG1 (model AH - 6WG1XYSA - 03) engine assembly corresponding to part number 4637167 is the original power core of Hitachi ZX870-3 (including ZX870H - 3) excavators, suitable for the heavy - duty operation requirements of this model. It is a 6 - cylinder in - line water - cooled turbocharged diesel engine with a displacement of 15.681L, a rated power of 397kW/1800rpm and a maximum torque of 2250N·m/1600rpm. With strong power and stable output, it is the core power source to ensure the efficient completion of heavy - duty operations such as mine stripping and large - scale infrastructure construction by the whole machine.

The cylinder block is made of high - strength alloy cast iron and nitrided, featuring excellent wear resistance and deformation resistance. Key components such as pistons and connecting rods are made of high - strength forged steel. Combined with a high - precision electronic control fuel injection system, it has high combustion efficiency and meets industry emission standards. The engine is suitable for operating environments ranging from - 30°C to 50°C, with a service life of more than 12,000 hours without major overhauls. It can operate stably for a long time under harsh working conditions such as dust, heavy load and frequent starts and stops, without failures like leakage and abnormal vibration, boasting excellent reliability and durability.

It strictly matches the original installation interface, flywheel housing size and hydraulic system connection parameters of ZX870-3, enabling quick replacement without additional modification. With the help of special lifting and installation tools, the assembly replacement can be completed in 6-8 hours, which greatly shortens the downtime. Its stable power output can increase the excavation efficiency by more than 20% and reduce the fuel consumption by 10%-15%. Meanwhile, it reduces the impact on the hydraulic system, extends the service life of core components such as the main pump and distribution valve, lowers the overall comprehensive maintenance cost of the whole machine and improves the operation cost - effectiveness of the equipment.